If you have installed resin tiles on your roof and notice that they have naturally cracked after a year, there are a few steps you can take to remedy the situation. Firstly, check the warranty on the tiles to see if they are covered for replacement. If not, consider purchasing heavy duty plastic corrugated roofing sheets or PVC rigid plastic sheets to replace the damaged tiles. These materials are durable and long-lasting, providing a reliable alternative to traditional resin tiles. You can easily find PVC roof shingles for sale at local hardware stores or online retailers. Additionally, make sure to inspect the underlying structure of the roof and address any potential issues that may be causing the cracking. By taking proactive steps to address the problem, you can ensure that your roof remains in top condition for years to come.